Dishwasher makes loud grinding, rattling, or buzzing noises during wash.

Safety First: Disconnect power before reaching into the sump.

Steps:

• Inspect interior: Check that utensils are secured and not protruding through the rack to hit spray arms.
• Check spray arms: Spin arms by hand and listen for scraping. Remove any obstructions.
• Clean sump: Remove filters and inspect the sump for broken glass, bones, or hard debris. Carefully remove with pliers.
• Access pump: If noise persists, access the circulation pump from below and inspect the impeller for damage or debris. Replace the pump if bearings are noisy or impeller is damaged.